Problem:

When you pan a model in XOR/XOS, based on ATI graphic (Radeon or FireGL series) and Preferences > Hardware > OpenGL > Frame Buffer Save/Restore is “FBO” in the application,

Fig1. Preference Setting

the model unpredictably moves in the Model View as shown in the image below - fig2 and fig3.

Fig2. Before Panning

Fig3. After Panning

Solution:

You have to disable the Anti-Aliasing function that is supported by the graphic driver.
Go to your graphic controller and turn off the Anti Aliasing setting.

Fig4. Disabled Anti Aliasing Setting